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'16 GeoCo�icaf echnics Inc. <br />' 2741 River Road <br /> Modesto,Ca&fomta 95351 <br /> (209)538-6424/gax#538-5852 <br /> REPORT <br /> Groundwater Monitoring <br /> 2°d Quarter 2000 <br /> George's Service <br /> 1600 Durham Ferry Road <br /> Tracy, California <br />' <br /> Project No 425 2 <br /> August 15, 2000 <br /> EXECUTIVE SUMMARY <br /> ' This report summarizes the 2"d Quarter 2000 groundwater monitoring and testing that took <br /> place on June 20, 2000 <br /> ' Groundwater gradients and bearings were calculated and are summarized as follows <br /> o Water table 0 0021 ft/ft at N18°E <br /> • Intermediate 0 0031 ft/ft at N850E <br /> results from the June 2000 monitoring show that aromatic hydrocarbon <br /> The analytical res g Y <br /> compounds (BTEX) and gasoline range petroleum hydrocarbons (TPH-G) are present to 4 of <br /> ' the 12 monitoring wells (MW-1, MW-2, MW-4 and MW-5) MTBE was detected in MW-1 <br /> by EPA method 602, however the well is regularly non-detect for MTBE when tested by <br /> 1 EPA method 8260 Three domestic water wells in the immediate area of the tanks were <br /> tested and found to be non-detect for all analytes <br /> A summary of findings include <br /> 1 Hydrogeology <br /> • The shallow groundwater gradient continues a trend towards the NE However, the <br /> predominate flow direction over the course of the project has been to the N, with <br /> slight variation to the NW and NE <br /> 6 <br /> l' <br />